Treatment of mercerized cotton goods.



- hath.

UNITED STATES, PATENT OFFICE.

FRIEDRICH EDUARD no'rTmER, o-F OFFENBAOH-ON-THE-MAIN, QEBMANY, g sslqu on TO THE CORPORATION OF cn'EMIscnE FABRIK. GRIEsnEIM-ELEKTRoN, 6F ,FRA x FORT-ON-THE-MAIN, GERMANY.

TREATMENT OF M-ERGERIZED COTTON GOODS.

No Drawing.

To all whom "it may concern:

Be it known that l. l lll-lfllltlt'll llnrzous i-oicn. doctor OflJlllltlHtljJll). 't'licifnist. a,

no -t otli c i'iddrm lnul u iggtr sc No. l hart inrt-ntod ncw and umti'ul linprorcincnts Itclatin g to thc 'lrr-at uont of -,\[cl 'cci'i7icd (lottoo (loods, of which thc following is a snoriticnti n; i t i l i\ crackling fool in gircu to nugrccrizctl cotton goods h worlonrn thorn in in soap hath and souring HflflHHtltl. lf rin this proccss goods are used. which liaic hen-n dyed with sulfurizcd. dycatufi's, the coloracid of those dycstutl's' i.'-: lihcrated hr the action of thc acid'uscd in tho souring process. The sulfur of the dycstutl? thou la comes oxidized to sulfuric acid gradually or at once according to the conditiorm 'lhis acid tenders or even disintcgrates tho cotton illjfll on prolonged storage, hot [)Ift'fvifiltlfl. shrii'iking and finishing of hosiery. To avoid this tcndcring of the tihcr an addition of to grams of sodium acetate pcr litcr of acid hath (10 grams oi acctic acid pcr litcr) has hocn noposcd in tholiuitcd Statehspecification No. (3936513, in English SlJt't'ltication No. 25172 of 1901 and in Front-h spccilication No. 25082 38. The u'cscrilmt quantity of *{imllllltl acetateprcrcnts the dctcrioration of the fihcr only partly as will lJO shown by the following SlLZIlIHlOHl. i\ yarn (/4: Maco) dycd with, sulfur hlar'lc lost. 75.82 poi cont. of its original tensile stnang'th by tho procccs of giving it a crackling tool by moans of acctic acid (it) grains pct liter) and stcau'iing al tvrward (onihour at 1% atn'iosphercs), 30.42 o'er cont. Irv azldition of 5 grams of sodium :mctatc n-r liter acid bath and 8.55) per cent. by addition ol 10 grams sodium acetate. 'lo prcucrvv coinplctely the tensile strength of the cotton film! an addition of a largo:- proporlion 0t sodinm acctato must; he nuulo to thc acid )n applying such largo proportions ol sodium acetate in tho pronoun howcrcr a :crackling fool cannot he l'ilftultlrttrl, ()n addition of It) grainsol' Hodiuin :u-cta-tc |nr lit'or the crack-ling tool will luwry I'm-lilo, on addition of 15 'gramu it cannot he nor ccivcd any more. "l'l'1crcl'orc this proccsu is not lit to produce tho scroop of silk on Sp ecifica'tion of Letters ia'te'nt.

' Application filer] m 24,1909. SeririlNq. 599.37%. a n,

t 2., n! n icrceriliccl cotton goods, (la/(ul- \\'-iil 1"fitllfl'tl izcd dyeotull's, without rcdncii'ig theft-ens o strength of tho lllltl.

t(-orrlin,q to thc presentv i'nrcntioii a W l" good rravklii-ig Trot tritilillt? il-llpllll'ttl:10 d! I ton in moans otlrrdioxu "mitotic-2n of tlunaliphatic. 1rri s,-'to wi lactic oi' t'ai tarir arid, hr tho. addition ot slu 'h proptit t'n-jng .ot the salts of tho iia'id gncitla 0'1" partly neutralizing t lusaid acids mimic] tlt.' 9 l't't that. the cotton tihcr may, not b dc'rod. How lll tlt'lrjflfdtlttl tltld' has iu-titzrnlizujd or lujiw nnn-h 'lactatc 01 has to ho addcd to tho acid liatlt'djfl'cnd. the intcnsity of tho dyeing, on the sulfurized d rcstull' uscd in the dyeing PL'UIIUSJ, and on tlie noportion of acid added to the both. It in tho process of imparting a crackling foal .to cotton goods, dyed with 10 per cent. of 'thiog iu black, 5 grams of lactic acid for instaniFc arc to he used, about 15 grams of sodium lactate or 17 gramsJof lactic acid and 7 grams of anhydrous sodium carbonate or grains of caustic soda lye of" lainn specific gravity, must be added per liter.

The host rcsults in carrying out the new process are ohtaincd if one part of the acid uscd in tho aflcr lltiltllIOlltOf tho n'lerccriy-cd cotton, dycd with sulfurized dyestuffs, 3 to 5 parts of its salts arc added.

As tho acids mentioned in the said speciliciltioiw are not suitable for producing a crackling t'ocl on incrcerizcd cotton, dyed with unll'urizcd dycstutts, without weakening tho tcusilo Htrcugt h of thc fiber, the particular action ot the acids and their salts t..lIl|Jl('l \'Ltl according in this invention for iu'ifiarting the ucroop ol. silk to cotton goods withoutreducing thc l'tlllHilt. strcnggth (rt-tho titmcould not; be torcsecn.

'lhc nu-thod ot applying-this invention will he illnstratcd by tho Folhuring cXarnplcs.

hlxaulplc I, pounds of inorrcrizml cotton yarn arc dycd in tho usual manner with 100 a. black snll'urizcd dycututl' 'lior instance thioxin lt'lo. rinsed and worked inn soap hath containing 5 to 10 grams ol" soap por litor. "lho yarn i hydro-cxtractod without living riluzod and trcatcd in a hath containing l7 grains of lm-tiraoid and 7 grams of anhydrous sodium carhonato or 22.4 grams of caustic soda lye :50" Hanna; .poeitic gravity. Theyarn is worked-in this partly neu tralized bath for ,15 to 20 minutes h droextracted without being rinsed and ried.

- The arn thust-reatcd ac( uires a ood crack-' 5 ling feel and the original tensile strength of the fiber is not alteredby steamingunder pl ess rir 01" on prolongedstorage. Instead of lactic acid and sodium carbonate or callstic soda lye 5 grams of lactic acid and 15 grams of sodium lactate may be used to ob-' tain-the same result.

Example II.The process is carried out according to Example I but instead of lactic acid 21.3 grams of tartaric acid or 5g1 ams tartaric acid and grams of sodiumtar trate and 11.5 grams of anhydroussodium carbonate or 36.7 grams caustic soda lye Baum specific gravity may be used per liter of dye bath. V

y 1. The process of giving the scroo'p of ,silk to merceri zed cotton goods, dyed with lsulfurized dyestuffs, consisting in souring the goods, after a passage through a soap bath with a hydroxy-carboxylic acid of the aliphatic series in presence of a salt of said acid, wherein to one part the used acid 3 to 5 parts of a salt of this acid are added, substantially asdescribed.

2. The process of giving the scroop .of silk to mercerized cotton goods dyed with sulfurized dyestuffs, consisting in soaring the goods, after a passage through a soap bath with lactic acit this acid, wherein to one part of lactic acid, used in the process, 3 parts of a lactate are added, substantially. as described.

In testimony, as my invention, I have signed my name in presence of two witnesses, this thirteenth day of J uly, 1.909. 1

FRIEDRICH EDUARD BliTTIGER.

, Witnesses:

JEAN Gaun ROBERT BI'JHL.

in presence of a salt of that I claim the foregoing- 

